C++ pipe_sampler_view_reference函数代码示例

static void
save_sampler_views(struct cso_context *ctx,
                   struct sampler_info *info)
{
   uint i;

   info->nr_views_saved = info->nr_views;

   for (i = 0; i < info->nr_views; i++) {
      assert(!info->views_saved[i]);
      pipe_sampler_view_reference(&info->views_saved[i], info->views[i]);
   }
}

static void
cso_save_fragment_sampler_views(struct cso_context *ctx)
{
    unsigned i;

    ctx->nr_fragment_views_saved = ctx->nr_fragment_views;

    for (i = 0; i < ctx->nr_fragment_views; i++) {
        assert(!ctx->fragment_views_saved[i]);
        pipe_sampler_view_reference(&ctx->fragment_views_saved[i],
                                    ctx->fragment_views[i]);
    }
}

static void
nv30_fragtex_set_sampler_views(struct pipe_context *pipe, unsigned nr,
                               struct pipe_sampler_view **views)
{
   struct nv30_context *nv30 = nv30_context(pipe);
   unsigned i;

   for (i = 0; i < nr; i++) {
      nouveau_bufctx_reset(nv30->bufctx, BUFCTX_FRAGTEX(i));
      pipe_sampler_view_reference(&nv30->fragprog.textures[i], views[i]);
      nv30->fragprog.dirty_samplers |= (1 << i);
   }

   for (; i < nv30->fragprog.num_textures; i++) {
      nouveau_bufctx_reset(nv30->bufctx, BUFCTX_FRAGTEX(i));
      pipe_sampler_view_reference(&nv30->fragprog.textures[i], NULL);
      nv30->fragprog.dirty_samplers |= (1 << i);
   }

   nv30->fragprog.num_textures = nr;
   nv30->dirty |= NV30_NEW_FRAGTEX;
}

void
cso_save_sampler_views(struct cso_context *ctx, unsigned shader_stage)
{
   struct sampler_info *info = &ctx->samplers[shader_stage];
   unsigned i;

   info->nr_views_saved = info->nr_views;

   for (i = 0; i < info->nr_views; i++) {
      assert(!info->views_saved[i]);
      pipe_sampler_view_reference(&info->views_saved[i], info->views[i]);
   }
}

static void r600_copy_first_sample(struct pipe_context *ctx,
				   const struct pipe_resolve_info *info)
{
	struct r600_context *rctx = (struct r600_context *)ctx;
	struct r600_texture *rsrc = (struct r600_texture*)info->src.res;
	struct pipe_surface *dst_view, dst_templ;
	struct pipe_sampler_view src_templ, *src_view;
	struct pipe_box box;

	if (rsrc->is_depth && !rsrc->is_flushing_texture) {
		if (!r600_init_flushed_depth_texture(ctx, info->src.res, NULL))
			return; /* error */

		/* Decompress the first sample only. */
		r600_blit_decompress_depth(ctx,	rsrc, NULL,
					   0, 0,
					   info->src.layer, info->src.layer,
					   0, 0);
	}
	if (rctx->chip_class != CAYMAN && rsrc->fmask_size && rsrc->cmask_size) {
		r600_blit_decompress_color(ctx, rsrc,
					   0, 0,
					   info->src.layer, info->src.layer);
	}

	/* this is correct for upside-down blits too */
	u_box_2d(info->src.x0,
		 info->src.y0,
		 info->src.x1 - info->src.x0,
		 info->src.y1 - info->src.y0, &box);

	/* Initialize the surface. */
	util_blitter_default_dst_texture(&dst_templ, info->dst.res,
					 info->dst.level, info->dst.layer, &box);
	dst_view = ctx->create_surface(ctx, info->dst.res, &dst_templ);

	/* Initialize the sampler view. */
	util_blitter_default_src_texture(&src_templ, info->src.res, 0);
	src_view = ctx->create_sampler_view(ctx, info->src.res, &src_templ);

	/* Copy the first sample into dst. */
	r600_blitter_begin(ctx, R600_COPY_TEXTURE);
	util_blitter_copy_texture_view(rctx->blitter, dst_view, ~0, info->dst.x0,
				       info->dst.y0, src_view, 0, &box,
				       info->src.res->width0, info->src.res->height0,
				       info->mask);
	r600_blitter_end(ctx);

	pipe_surface_reference(&dst_view, NULL);
	pipe_sampler_view_reference(&src_view, NULL);
}

/**
 * If there's anything in the bitmap cache, draw/flush it now.
 */
void
st_flush_bitmap_cache(struct st_context *st)
{
   if (!st->bitmap.cache->empty) {
      struct bitmap_cache *cache = st->bitmap.cache;

      if (st->ctx->DrawBuffer) {
         struct pipe_context *pipe = st->pipe;
         struct pipe_sampler_view *sv;

         assert(cache->xmin <= cache->xmax);
 
/*         printf("flush size %d x %d  at %d, %d\n",
                cache->xmax - cache->xmin,
                cache->ymax - cache->ymin,
                cache->xpos, cache->ypos);
*/

         /* The texture transfer has been mapped until now.
          * So unmap and release the texture transfer before drawing.
          */
         if (cache->trans) {
            if (0)
               print_cache(cache);
            pipe_transfer_unmap(pipe, cache->trans);
            cache->buffer = NULL;

            pipe->transfer_destroy(pipe, cache->trans);
            cache->trans = NULL;
         }

         sv = st_create_texture_sampler_view(st->pipe, cache->texture);
         if (sv) {
            draw_bitmap_quad(st->ctx,
                             cache->xpos,
                             cache->ypos,
                             cache->zpos,
                             BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT,
                             sv,
                             cache->color);

            pipe_sampler_view_reference(&sv, NULL);
         }
      }

      /* release/free the texture */
      pipe_resource_reference(&cache->texture, NULL);

      reset_cache(st);
   }
}

bool
vl_zscan_init_buffer(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
                     struct pipe_sampler_view *src, struct pipe_surface *dst)
{
   struct pipe_resource res_tmpl, *res;
   struct pipe_sampler_view sv_tmpl;

   assert(zscan && buffer);

   memset(buffer, 0, sizeof(struct vl_zscan_buffer));

   pipe_sampler_view_reference(&buffer->src, src);

   buffer->viewport.scale[0] = dst->width;
   buffer->viewport.scale[1] = dst->height;
   buffer->viewport.scale[2] = 1;
   buffer->viewport.scale[3] = 1;
   buffer->viewport.translate[0] = 0;
   buffer->viewport.translate[1] = 0;
   buffer->viewport.translate[2] = 0;
   buffer->viewport.translate[3] = 0;

   buffer->fb_state.width = dst->width;
   buffer->fb_state.height = dst->height;
   buffer->fb_state.nr_cbufs = 1;
   pipe_surface_reference(&buffer->fb_state.cbufs[0], dst);

   memset(&res_tmpl, 0, sizeof(res_tmpl));
   res_tmpl.target = PIPE_TEXTURE_3D;
   res_tmpl.format = PIPE_FORMAT_R8_UNORM;
   res_tmpl.width0 = VL_BLOCK_WIDTH * zscan->blocks_per_line;
   res_tmpl.height0 = VL_BLOCK_HEIGHT;
   res_tmpl.depth0 = 2;
   res_tmpl.array_size = 1;
   res_tmpl.usage = PIPE_USAGE_IMMUTABLE;
   res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;

   res = zscan->pipe->screen->resource_create(zscan->pipe->screen, &res_tmpl);
   if (!res)
      return false;

   memset(&sv_tmpl, 0, sizeof(sv_tmpl));
   u_sampler_view_default_template(&sv_tmpl, res, res->format);
   sv_tmpl.swizzle_r = sv_tmpl.swizzle_g = sv_tmpl.swizzle_b = sv_tmpl.swizzle_a = TGSI_SWIZZLE_X;
   buffer->quant = zscan->pipe->create_sampler_view(zscan->pipe, res, &sv_tmpl);
   pipe_resource_reference(&res, NULL);
   if (!buffer->quant)
      return false;

   return true;
}

static void
restore_sampler_views(struct cso_context *ctx,
                      struct sampler_info *info,
                      void (*set_views)(struct pipe_context *,
                                        unsigned num_views,
                                        struct pipe_sampler_view **))
{
   uint i;

   for (i = 0; i < info->nr_views_saved; i++) {
      pipe_sampler_view_reference(&info->views[i], info->views_saved[i]);
      pipe_sampler_view_reference(&info->views_saved[i], NULL);
   }
   for (; i < info->nr_views; i++) {
      pipe_sampler_view_reference(&info->views[i], NULL);
   }

   /* bind the old/saved sampler views */
   set_views(ctx->pipe, info->nr_views_saved, info->views);

   info->nr_views = info->nr_views_saved;
   info->nr_views_saved = 0;
}

bool
vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
                    struct pipe_sampler_view *source,
                    struct pipe_sampler_view *intermediate)
{
    assert(buffer && idct);
    assert(source && intermediate);

    memset(buffer, 0, sizeof(struct vl_idct_buffer));

    pipe_sampler_view_reference(&buffer->sampler_views.individual.matrix, idct->matrix);
    pipe_sampler_view_reference(&buffer->sampler_views.individual.source, source);
    pipe_sampler_view_reference(&buffer->sampler_views.individual.transpose, idct->transpose);
    pipe_sampler_view_reference(&buffer->sampler_views.individual.intermediate, intermediate);

    if (!init_source(idct, buffer))
        return false;

    if (!init_intermediate(idct, buffer))
        return false;

    return true;
}

void
ilo_state_vector_cleanup(struct ilo_state_vector *vec)
{
   unsigned i, sh;

   for (i = 0; i < Elements(vec->vb.states); i++) {
      if (vec->vb.enabled_mask & (1 << i))
         pipe_resource_reference(&vec->vb.states[i].buffer, NULL);
   }

   pipe_resource_reference(&vec->ib.buffer, NULL);
   pipe_resource_reference(&vec->ib.hw_resource, NULL);

   for (i = 0; i < vec->so.count; i++)
      pipe_so_target_reference(&vec->so.states[i], NULL);

   for (sh = 0; sh < PIPE_SHADER_TYPES; sh++) {
      for (i = 0; i < vec->view[sh].count; i++) {
         struct pipe_sampler_view *view = vec->view[sh].states[i];
         pipe_sampler_view_reference(&view, NULL);
      }

      for (i = 0; i < Elements(vec->cbuf[sh].cso); i++) {
         struct ilo_cbuf_cso *cbuf = &vec->cbuf[sh].cso[i];
         pipe_resource_reference(&cbuf->resource, NULL);
      }
   }

   for (i = 0; i < vec->resource.count; i++)
      pipe_surface_reference(&vec->resource.states[i], NULL);

   for (i = 0; i < vec->fb.state.nr_cbufs; i++)
      pipe_surface_reference(&vec->fb.state.cbufs[i], NULL);

   if (vec->fb.state.zsbuf)
      pipe_surface_reference(&vec->fb.state.zsbuf, NULL);

   for (i = 0; i < vec->cs_resource.count; i++)
      pipe_surface_reference(&vec->cs_resource.states[i], NULL);

   for (i = 0; i < vec->global_binding.count; i++) {
      struct ilo_global_binding_cso *cso =
         util_dynarray_element(&vec->global_binding.bindings,
               struct ilo_global_binding_cso, i);
      pipe_resource_reference(&cso->resource, NULL);
   }

   util_dynarray_fini(&vec->global_binding.bindings);
}

static void
st_vdpau_unmap_surface(struct gl_context *ctx, GLenum target, GLenum access,
                       GLboolean output, struct gl_texture_object *texObj,
                       struct gl_texture_image *texImage,
                       const GLvoid *vdpSurface, GLuint index)
{
   struct st_texture_object *stObj = st_texture_object(texObj);
   struct st_texture_image *stImage = st_texture_image(texImage);

   pipe_resource_reference(&stObj->pt, NULL);
   pipe_sampler_view_reference(&stObj->sampler_view, NULL);
   pipe_resource_reference(&stImage->pt, NULL);

   _mesa_dirty_texobj(ctx, texObj);
}

void
st_texture_release_sampler_view(struct st_context *st,
                                struct st_texture_object *stObj)
{
   GLuint i;

   for (i = 0; i < stObj->num_sampler_views; ++i) {
      struct pipe_sampler_view **sv = &stObj->sampler_views[i];

      if (*sv && (*sv)->context == st->pipe) {
         pipe_sampler_view_reference(sv, NULL);
         break;
      }
   }
}

void
cso_set_sampler_views(struct cso_context *ctx,
                      unsigned shader_stage,
                      unsigned count,
                      struct pipe_sampler_view **views)
{
   struct sampler_info *info = &ctx->samplers[shader_stage];
   unsigned i;

   /* reference new views */
   for (i = 0; i < count; i++) {
      pipe_sampler_view_reference(&info->views[i], views[i]);
   }
   /* unref extra old views, if any */
   for (; i < info->nr_views; i++) {
      pipe_sampler_view_reference(&info->views[i], NULL);
   }

   info->nr_views = count;

   /* bind the new sampler views */
   ctx->pipe->set_sampler_views(ctx->pipe, shader_stage, 0, count,
                                info->views);
}

/**
 * Called via ctx->Driver.Bitmap()
 */
static void
st_Bitmap(struct gl_context *ctx, GLint x, GLint y,
          GLsizei width, GLsizei height,
          const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap )
{
   struct st_context *st = st_context(ctx);
   struct pipe_resource *pt;

   if (width == 0 || height == 0)
      return;

   st_validate_state(st);

   if (!st->bitmap.vs) {
      /* create pass-through vertex shader now */
      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
                                      TGSI_SEMANTIC_COLOR,
        st->needs_texcoord_semantic ? TGSI_SEMANTIC_TEXCOORD :
                                      TGSI_SEMANTIC_GENERIC };
      const uint semantic_indexes[] = { 0, 0, 0 };
      st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3,
                                                          semantic_names,
                                                          semantic_indexes,
                                                          FALSE);
   }

   if (UseBitmapCache && accum_bitmap(ctx, x, y, width, height, unpack, bitmap))
      return;

   pt = make_bitmap_texture(ctx, width, height, unpack, bitmap);
   if (pt) {
      struct pipe_sampler_view *sv =
         st_create_texture_sampler_view(st->pipe, pt);

      assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT);

      if (sv) {
         draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2],
                          width, height, sv,
                          st->ctx->Current.RasterColor);

         pipe_sampler_view_reference(&sv, NULL);
      }

      /* release/free the texture */
      pipe_resource_reference(&pt, NULL);
   }
}

/**
 * Called via ctx->Driver.Bitmap()
 */
static void
st_Bitmap(struct gl_context *ctx, GLint x, GLint y,
          GLsizei width, GLsizei height,
          const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap )
{
    struct st_context *st = st_context(ctx);
    struct pipe_resource *pt;

    assert(width > 0);
    assert(height > 0);

    st_invalidate_readpix_cache(st);

    if (!st->bitmap.cache) {
        init_bitmap_state(st);
    }

    /* We only need to validate any non-ST_NEW_CONSTANTS state. The VS we use
     * for bitmap drawing uses no constants and the FS constants are
     * explicitly uploaded in the draw_bitmap_quad() function.
     */
    if ((st->dirty | ctx->NewDriverState) & ~ST_NEW_CONSTANTS &
            ST_PIPELINE_RENDER_STATE_MASK ||
            st->gfx_shaders_may_be_dirty) {
        st_validate_state(st, ST_PIPELINE_RENDER);
    }

    if (UseBitmapCache && accum_bitmap(ctx, x, y, width, height, unpack, bitmap))
        return;

    pt = make_bitmap_texture(ctx, width, height, unpack, bitmap);
    if (pt) {
        struct pipe_sampler_view *sv =
            st_create_texture_sampler_view(st->pipe, pt);

        assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT);

        if (sv) {
            draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2],
                             width, height, sv, ctx->Current.RasterColor);

            pipe_sampler_view_reference(&sv, NULL);
        }

        /* release/free the texture */
        pipe_resource_reference(&pt, NULL);
    }
}